Ore-roasting furnace



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ORE ROASTING PURNAGE. Y No. 321,003. Patent-edJ-u'ne 30, 1885.

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W. BRGKNER. y ORE ROASTING PURNAGE. Y No. 321;*003. Patented June 30, 1885.

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// Y r v UNITED STATES PATENT OFFICE.

WILLIAM BRCKNER, OF SAN FRANCISCO, CALIFORNIA.

ORE-ROASTING FURNACE.

SPECIFICATION forming part of Letters Patent No. 321,003, dated June 30, 1885.

Application filed March 29, 1884. (No model.)

To all whom, t may concern:

Be it known that I, WILLIAM BEcKNER, a citizen of the United States of America, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Ore-Roasting Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to au improved oreroasting furnace.

The object of the invent-ion is to obtain a furnace in which the ore will be thoroughly roasted, and which will be simple in construction.

To the accomplishment of the above the invention consists of the novel devices and cornbination of devices, as will be described and claimed.

Reference will be made to the accompanying drawings, in which Figure 1 is a sectional view through the apparatus, Fig. 2, an end elevation, partly in section, Fig. 3, aseetional `view of a modified arrangement; and Fig. 4.

represents a sprinkler.

Like letters refer to like parts in each view.

A represents a furnace provided with suitable feed and cleaning doors, and with a grate, B. Furnace Aconununieates through'a pipe, C, with a chamber, D, which, as shownin Fig. l,is supported upon suitable pillars, E. Charnber D is formed, preferably, of an iron shell lined with brick, and its bottom plate forms the roasting-plate, there being formed thereon a wall of masonry, F, which is inclined toward a pipe, G, which connects said chamber with the revolving cylinder H, as will be described. Tapped into pipe C is a blast-nozzle, I, and into pipe G a nozzle, K.

The operation of the parts thus far described is as follows: A fire is built upon grate B, and the gases arising therefrom pass through pipe C to chamber D. Orein a powder form is then fed through nozzle Land forced upward in said chamber,and,eommingling with said uses,the sulphur therein contained is ignited. The ore thus heated then falls, inthe forni of numberless sparks, either directly into pipe G or upon incline F, by which it is fed to said pipe, and upon thus entering this pipe G it is forced by the blast from nozzle K to the revolving cylinder H. Cylinder H has end bearing in wall L, and is provided upon its outer face with one or more flanges, a, which rest upon grooved or plain rollers M. driven by suitable power from a shaft, N, while the others are driven through friction; or, if desired, more may be imparted to the cylinder in any other well-known way. Cylinder H consists, preferably, of a metal shell lined with brick, and has formed through it two or more series of openings surrounded by frames secured upon the outer face of the cylinder and arranged to form pockets O. Each pocket thus formed is closed by a hinged door, P, which may be opened when desired, as will be described, but which otherwise are held closed by a lever or catch, b', and may be held open by a spring, I). All the pockets of one series (nearest the feeding end of the cylinder) are formed at an incline to the cylinder in 0rder that the ore elevated thereby may be thrown toward the opposite end of the cylinder, while those of the second series are placed at an opposite incline to throw theorcback to be elevated by the first series.

It will be understood that upon the revolution of the cylinder the ore fed thereto in settlingin thebottoni will fall into one of the first series of pockets, and by it be elevated until such pocket occupies a position to cause such ore to be discharged therefrom down through the flame or hot-air blast, to be again elevated and discharged by the second series of pockets. The blast from pipe G passes through the cylinder, as indicated by the arrows in Fig. l, for finishing the roasting process with or without the use of salt and fuel, and carries off the draft and gases through a discharge-pipe, Q,

v communicating with a suitable dust-chamber.

R represents a door closing the end of the cylinder, through which access may be obtained to the interior thereof for cleaning, repairing, &c. Upon the outer face of the elcvator-pockets it will be found advantageous to discharge a steam or water spray from asuitable sprinkler, for the purpose of cooling the same to avoid wear.

In Fig. 3 I have shown a modification of the apparatus herei nbefore described. In this figure the elevating-pockets with which the cylinder is provided are arranged in an oblique line with respect to one another, and are all inclined in the same direction, so that ore fed Two of said rollers are L IOO through feed-pipe S will be taken up by said pockets and gradually carried to the dischargeopening T.

I am aware that revolving cylinders have been provided upon their interior with projections for the elevation of the ore and its discharge through the flame or blast, and therefore disclaim such arrangement.

By providing the cylinder with the pockets described I obtain more ready access to the interior thereof for the removal of any ore that may stick to its inner face, and at the same time provide ready means for the discharge of the roasted ore; and by the arrangement of said pockets and the discharge of water or steam upon their outer surface I avoid the injurious effect of heated gases thereon.

1. A revolving ore-roasting cylinder provided with one or more series of elevatingpockets formed by openings through the cylinder, frames surrounding said openings upon theouter face of the cylinder, and doors adapted to close such pockets, as set forth.

2. A roasting-cylinder provided with one or more series of elevating-pockets closed by hinged doors, as described, in combination with mea'us for revolving said cylinder, as described.

3. A roasting-cylinder provided with two 3o rounding the openings upon the outer face of 4o the cylinder, and doors adapted to close such pockets, as set forth.

5. The combination, with chamber I), of revolving cylinder II, provided with pockets 0, and means for forcing a hot-air blast and pulverized ore through said chamber to said cylinder, as described 6. Tie combination, with chamber D, provided with incline F, of revolving cylinder H,

provided with pockets O, and means for fore 5o ing a hot-air blast and pulverized ore through said chamber to said cylinder, as described.

In testimony whereof I affix my signature in presence of two witnesses.

NVILLIAM BRUCKNER. Vitnesses:

M. J. GLAGETT, Louis N oLTING. 

